Weather Forecasts

Daily Weather Summary

July 13, 1999:

An upper-level trough will move into Tennessee this afternoon.
Out ahead of it, the clouds that have hung around this morning
should give way to at least partial sunshine this afternoon.
However, due to limited moisture, any chances for rain will
be small. High: 85 Low: 65. Mixing Hgt.: 1600 m MSL.
850 mb winds are a tough call, but they should become
SEly during the day, at speeds < 7 knots.

Tomorrow's Forecast

July 14, 1999:

850 mb winds become SSWly, but still < 10 kts on Wednesday,
as another 500 mb trough swings across Tennessee. This trough
may bring some scattered cloud cover, but it will stay dry,
so any rain chances are extremely small. High: 87 Low: 67

Day after Tomorrow Forecast

July 15, 1999:

Expect some cloud cover, but some sunshine as well.
High: 87 Low: 68

Outlook

For Friday through Sunday, a surface high pressure ridge
builds in from the east, bringing southerly flow, warmer,
more moist Gulf air, and the typical partly cloudy skies
with isolated afternoon thunderstorms. Highs: 89-93.
Lows: 69-73.

Profiler Plume Depiction

The following shows a depiction of plume locations as predicted by the
profiler winds assimilated into a one-dimensional boundary layer model.
The top image shows particle positions as of the previous evening. The lower image shows particle positions as of the following morning for particles released beginning the previous noon.

Forecast Plumes

The following gives a depiction of plume locations using a Lagranagian Particle Model coupled to the Regional Spectral Model. The RSM is run daily in a forecast mode at TVA Muscle Shoals, Alabama.